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Acquisitions - (Other Intangible Assets) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Mar. 31, 2019
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Acquired Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets, gross amount | $ 523,306 | $ 523,432
Total intangible assets, accumulated amortization | (68,431) | (61,116)
Total intangible assets, net amount | 454,875 | 462,316
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross amount | 286,552 | 286,664
Finite-lived intangible assets, accumulated amortization | (48,224) | (42,704)
Finite-lived intangible assets, net amount | 238,328 | 243,960
Non-compete |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross amount | 3,015 | 3,025
Finite-lived intangible assets, accumulated amortization | (2,768) | (2,807)
Finite-lived intangible assets, net amount | 247 | 218
Technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross amount | 77,755 | 77,779
Finite-lived intangible assets, accumulated amortization | (14,033) | (12,229)
Finite-lived intangible assets, net amount | 63,722 | 65,550
Trademarks |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets, gross amount | 152,497 | 152,484
Indefinite-lived intangible assets, accumulated amortization | (953) | (953)
Indefinite-lived intangible assets, net amount | 151,544 | 151,531
Finite-lived intangible assets, gross amount | 2,003 | 2,003
Finite-lived intangible assets, accumulated amortization | (1,257) | (1,236)
Finite-lived intangible assets, net amount | 746 | 767
Licenses |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross amount | 1,484 | 1,477
Finite-lived intangible assets, accumulated amortization | (1,196) | (1,187)
Finite-lived intangible assets, net amount | $ 288 | $ 290

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